The problem of finding a concept of a taxonomic species that can be usefully applied to many very different types of organism.

(philosophy, literary) From the viewpoint of eternity.

(chemistry) Any peroxide, singlet oxygen or similar material that is a reactive oxidizing agent

(historical) A Norwegian coin minted from 1816 to 1875, divided into 120 skilling.

(philosophy, ethics) An ethical stance that assigns different worth or rights to beings on the basis of their species membership, such as assigning greater rights to human beings than to other animals.

plural of speciesist

A proponent of speciesism.

Of or relating to speciesism.

Throughout a species.

Throughout a species.